Get 10 Your Application in Google App Engine

Run your web applications on Google's infrastructure.
http://appspot.com/
Google App Engine enables developers to build web applications on the same scalable systems that power our own applications.
No assembly required.
Google App Engine exposes a fully-integrated development environment.

It's easy to scale.
Google App Engine makes it easy to design scalable applications that grow from one to millions of users without infrastructure headaches.

It's free to get started.
Every Google App Engine application will have enough CPU, bandwidth, and storage to serve around 5 million monthly pageviews for free. You can purchase additional resources at competitive prices when you need them and you'll pay only for what you use.

This is a preview release of Google App Engine. To get started, sign in to Google App Engine with your Google Account, or explore our documentation to download our SDK and learn about what we're working on.

If you'd like to sign in to Google App Engine with your Google Apps account, use the following URL:

https://appengine.google.com/a//

Source from : http://appspot.com/